Thread: Gearbox D3 box Not changing up or down when cold only

Is it the correct oil and when was it last changed?
Chris

Originally Posted by cafe latte

Is it the correct oil and when was it last changed?
Chris

Hi Chris
New gearbox was installed by Ritta, They also replaced the gear box oil pan and added the new oil. I'd be a bit surprised if that was the issue. As mentioned I had seen it just very rarely inside 50,000km on the new box before the warranty on it expired. 350,000 + on my clock now and only about 100,000 on the gearbox. I have been pretty generous/big on maintenance and fixing issues on it.

Today it was very sticky- no gear change at all before lunch without using command shift. I am looking I guess for the Brains Trust ( you gents) thoughts or suggestions. No error codes at all today.

So you have 100,000km on the gearbox oil?
If so replace it and see if it helps.
Chris

Originally Posted by cafe latte

So you have 100,000km on the gearbox oil?
If so replace it and see if it helps.
Chris

Will do.Oddly not one issue today, Perfect manors! I hate faults I cannot replicate. Nice to note few or no others seeing this. Lucky me

It is possibly a mechatronics issue as it seems to be getting the correct commands from the engine ie no faults recorded. Was your original mechatronics ( valve body) swapped into the replacement trans or was it a whole reco exchange transmission unit?

Jc

If you have access to live data , keep an eye on engine oil temp , trans temp and coolant temp, if one of those sensors plays up it won't show a code but it can cause those symptoms, I did one a couple of weeks ago that was the engine oil temp sensor . trans will hold gears and keep torque converter unlocked until it thinks its warmed up enough .

Originally Posted by justinc

It is possibly a mechatronics issue as it seems to be getting the correct commands from the engine ie no faults recorded. Was your original mechatronics ( valve body) swapped into the replacement trans or was it a whole reco exchange transmission unit?

Jc

^^^that too , Justin do you think if one or all eds solonoids were showing abnormally low adaption pressures it could point to a leaking separator plate seal?, also have you had any luck with recon torque converters
Cheers

Adaption pressures are also indicative of driving style ( over a period), frequency of or lack of servicing and clutch wear rates... hard to use them as an indicator because of those reasons... best thing is to go back to the basics and pull yhe pan to inspect the filter and amount of / type of material in the pan/ magnets. And yes if caught early enough a reco converter can ' save' a transmission. Have done so on a few occasions.

Jc